1 and 400.
4
16 => 256 17 => 289 18 => 324 19 => 361 20 => 400
Fifteen of them. All but numbers of the form 4n-2 = 2, 6, 10, 14, 18
28 is a perfect number.
To find the perfect squares between 20 and 150, we need to determine the perfect squares less than 20 and the perfect squares greater than 150. The perfect squares less than 20 are 1, 4, 9, and 16. The perfect squares greater than 150 are 169 and 196. Therefore, there are 5 perfect squares between 20 and 150: 25, 36, 49, 64, and 81.
Three numbers.
30
The perfect squares that are less than 20 are 0, 1, 4, 9, and 16.
The first 6 perfect squares are 1,4,9,16,25, and 36, When you are doing perfect squares, you multiply by itself. Thank you Mrs.Pelfrey By: Camila
20 squares x 20 squares = 400 squares
1 and 400.
The only perfect number between 20 and 50 is 28.
Only one - 16
three ==================== There are an infinite number of them. Here are a few: (2.01)2 = 4.0401 (2.02)2 = 4.0804 (2.021)2 = 4.044121 (2.02101)2 = 4.08448142
4
400 and 900 are squares of 20 and 30, respectively.